先获取access_token

https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx5f676b24ce06d78d&secret=c70f1a249c1d7991ed5b6bd3dc44ee5d

使用raw方式,测试用postman

请求

body填json：
(scene)是参数

{
"path": "pages/index/index",
"scene": ""
}

POST请求：

• url （access_token）替换自己的

https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=10_d4P_drI7q30_vBzhFH4gW3F2GwIeysenTyAmqPjqC6dn1HWqaNt9xZEO6L2J2YXXVuZNQx8SN_w0HZywGeHHc3wj_V-ozy-ocb-NxLrupfVj-7wde3zNXA_Gv0sY8TEgetIyVikSXNkkz2FsWIVjAIAPBO

这只是其中的一种请求获取的方式，更多的方式查看

小程序获取二维码

---

上面的是通过postman来获取小程序码，下面的是通过代码获取

public function wxqrcode()
    {

        $uid = $this->post->uid;
        $uid = $this->getuid();

        $bigImgPath = '';

      $appid='xxxxx';
      $secert='xxxxxx';
        //处理获取二维码
        $tokenurl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appid&secret=$secert";
        $tokeninfo = $this->loadModel("wxapi")->curlget($tokenurl);
        $access_token = $tokeninfo[access_token];

        $url = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=";
        $url = $url.$access_token;

        $postparam = array(
            'scene'=>$uid
        );

        $qrdata = $this->getcomponent2($url,json_encode($postparam));

        $qCodePath = $qrdata;

        $qCodeImg = imagecreatefromstring($qCodePath);

        list($qCodeWidth, $qCodeHight, $qCodeType) = getimagesize($qCodePath);

        // imagecopymerge使用注解

        $filename = time().rand(100,900).".jpg";
        $path = "../../www/data/upload/diyqr";
        if (file_exists($path))
        {
            imagejpeg($qCodeImg,$path."/".$filename);
            $p = URL."/www/data/upload/diyqr/";
            $fn = $filename;

            $data['img'] = $p.$fn;
            ob_end_clean();
            header("content-disposition:attachment;filename=wxqrcode.png");
            header("content-length:" . filesize($path.'/'.$filename));
            readfile($path.'/'.$filename);
//            echo json_encode($data);
        }


        //保存文件
        imagedestroy($qCodeImg);
    }


/**
     * get请求
     * @param $url
     * @return mixed
     */
    public function curlget($url){
        $ch = curl_init();

        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, FALSE );
        curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, FALSE );
        $response = curl_exec($ch);
        curl_close( $ch );
        $rest = json_decode($response,true);
        return $rest;
    }

public function getcomponent2($url,$postdata){

        $ch = curl_init(); //用curl发送数据给api
        // curl_setopt( $ch, CURLOPT_POST, true );
        curl_setopt( $ch, CURLOPT_POST, true );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $ch, CURLOPT_URL, $url );
        curl_setopt( $ch, CURLOPT_POSTFIELDS, $postdata );
        curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, FALSE );
        curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, FALSE );
        curl_setopt($ch, CURLOPT_HTTPHEADER,0);
        $response = curl_exec($ch);
        curl_close( $ch );
        $rest = json_decode($response,true);
        return $response;
    }